block cancel character

例句：

1. 1. The road was blocked by a large truck.
   一辆大卡车挡住了路。
2. 2. He blocked the door to keep out the cold wind.
   他堵住门，挡风。
3. 3. The construction workers were blocking the street for demolition.
   建筑工人正在封锁街道进行拆迁。